package com.collection.hashtables;

import java.util.Hashtable;

public class SimpleHashtableExample {
	public static void main(String[] args) {
	    //create object of Hashtable
	    Hashtable ht = new Hashtable();
	   
	    /*
	      Add key value pair to Hashtable using
	      Object put(Object key, Object value) method of Java Hashtable class,
	      where key and value both are objects
	      and can not be null.
	      put method returns Object which is either the value previously tied
	      to the key or null if no value mapped to the key.
	    */
	   
	    ht.put("One", new Integer(1));
	    ht.put("Two", new Integer(2));
	   
	    /*
	      Please note that put method accepts Objects. Java Primitive values CAN NOT
	      be added directly to Hashtable. It must be converted to corrosponding
	      wrapper class first.
	    */
	   
	    //retrieve value using Object get(Object key) method of Java Hashtable class
	    Object obj = ht.get("One");
	    System.out.println(obj);  
	   
	    /*
	       Please note that the return type of get method is Object. The value must
	       be casted to the original class.
	    */
	  }
}
